I was furloughed from a major airline when hired at NetJets. Could have gone back to the major 2 years later but didn't want to. I went from military pilot straight to major airline, furloughed, flow down to regional, then to NetJets. I did fine in training, but we had a guy who had flown Part 135 single pilot in the same jet we were training on at NetJets. He knew the plane inside out but almost flunked out of training because he had such a hard time with SOP's and the crew concept.

So for training I suspect they like part 121 pilots and they didn't have any reservations hiring me. Now I will throw in a disclaimer, at the time I was hired starting pay was $27K/year and they were having trouble recruiting so they may not have been able to be that picky